A randomized controlled trial to compare the survival and success rate of implant supported, screw retained hybridcrowns on zirconia and titanium implants

Not Applicable

Conditions: gap of a missing teeth
K08.1
Loss of teeth due to accident, extraction or local periodontal disease

Registration Number: DRKS00014866

Lead Sponsor: Charité-Universitätsmedizin Berlin CC03 – Abteilung für zahnärztliche Prothetik, Alterszahnmedizin und Funktionslehre

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Complete

Sex: All

Target Recruitment: 60

Inclusion Criteria

the Patient will benefit from Implantation
- a signed consent form
- the Patient have to be 20 years old or more
- the gap of the missing tooth in the posterior Region must exceed 7.5 mm
- the minuim vertical dimension of the bone is 10.0 mm
- with sufficient antagonism
- neighboring implants must be loaded under clinical function for at least 1 year
- a period of at least 4 month after tooth extraction
- no need of bone augmentation with a minimum of 1 mm of circular bone volume
- only women with safe methods of contraception

Exclusion Criteria

- no willingness to sign the consent form
- smokers with more than 10 cigarettes per day
- Special systemic disease such as poorly regulated diabetes, endocrine diseases, heart diseases, poor immun System
- drugs taking to influence the bone metabolism such as bisphosphonats, kortikosteroide
- coagulation disorder
- pregnancy
- hypersensitivity to implant materials
- bruxism
- periodontitis
- insufficient oral Hygiene
- radiation
- paticipant of further studies
- insuffiecient bone level

Study & Design

Study Type: interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
For the primary endpoint, data should be censored for the survival time and success rate time (no technical or biological complications) of the final restoration. The results are binary coded: after 5 years of observation the restoration has survived or not.<br>

Secondary Outcome Measures

Name	Time	Method
technical complications: screw lossening, abutment or crown fracture, chipping and abrasion within the lithiumdisilikat ceramic<br>biological complications: bone losss and soft tissue loss around the implants and other periimplant parameters: Plaque index, BOP +, increasing pocket depth, recession, a-MMP 8 values. Furthermore esthetic parameters (the Pink and White esthetic score) were evaluated. The follow time with data acquisition will be once a year.<br>